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Notes on the genera Omospira, Lophospira and Turritoma, with descriptions of new Proterozoic species
J. G. Donald
1906
Article
Quarterly Journal of the Geological Society of London
62:552-572
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Taxa discussed in this work:
Arjamannia bellicarinata
Ectomaria orientalis
Hormotoma tenuifilosa
Lophospira excavata
Lophospira ferruginea
Lophospira subglobosa
Lophospira trispiralis
Loxoplocus sedgwicki
Ruedemannia instabilis